Paper-cutting machine.



N9. 839,351. v]?ATE1\TTED DEG. 25, 190.6.

S.-K. WHITE. PAPER CUTTING MACHINE. APPLICATION FILED Nov. 4. 1902.

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No. 539,351.. PATBNTED im. 25,1906.

s. K. WHITE. PAPER CUTTING MACHINE. PPPP IOATIONEILED Nov. 4. 1902.'

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110.839,351. PATENTED DEG. 25, 1906.V

s. K. WHITE.

PAPER CUTTING MACHINE.

APPLIGATION PILBD Nov. 4. 1902.-

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No.:8s9,'351. PATENTED DBG.25, 1906' l s. KfwH'ITB, y

PAPER CUTTING MACHINE. l

APPLICATION FILED NOV. 4. 1902.

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UNITED sTATEs PATENT OEEIOE.

.SAMUEL k.. vslfPnTE,y OF BATAVIA, rLLiNois,'AssIefNoaTol s. K. WHITE"COMPANY, A CORPORATION OE iLLiNOis.

t PAPER-CUTTING MACHINE.'

j Specificatonfof Letters, Patent.

Patented Dec. 25, 190e.

Application tiled November lM1902. Serial No. 130,255.

To H' whom; it; rma/y concern:

Beit. known that I, SAMUEL K. WHITE, a citizen of the United States, anda resident of Batavia, inthe county of Kane and Stateof Illinois, haveinvented certain new and useful' Improvements in. Paper-CuttingMachines, of which the following is a specification.

My invention relates to paper-cutting machines, and" more particularlyto a machine for cutting paper in pile form. i

The object of my invention isto so improve the variousfeatures of the`machine as to render the machine more powerful and at the same timemore rapid and more accurate and reliable in operation than anycuttingmachineA of the character referred to hereto"- forey devised.

Among the more important features of my invention are improvements intheconstruction ofthe cutter-bar and themechanism for operating the saine',including means for Overcomingy the momentum of the cutter-bar and partsconnected therewith, improvements in the cutting-bed, and improvementsin the paper-clamp and the mechanism for controlling the same. These andother features of the invention will more hilly appear from thefollowing` description. L

The invention consists of the novel parts, improvements, andcombinations hereinafter described.

The accompanying drawings, which are rey ferred to `herein and. form apart hereof, illustrate a machine embodying the various features of myinvention, the same serving, in

connection With 'the' description herein, to explain the principles ofthe invention and the best mode contemplated by me of carrying` thoseprinciples into effect.

Ofthe drawings, Figure 1 is a vertical' longitudinal section of themachine. Fig. 2 is i an end elevation 'as seen from the left in Fig.

3. Figs. 3 and 4 are respectively a front and rear elevation of themachine. Fig. 5 is'van elevation,jpartly in section, illustrating thedetails of the cutter-bar and parts connected y A therewith.v Fig. 6 isva transverse section of I of the construction.

The machineA which is shown :inthe drawper-cutters in which a, straightknife is given a compound movement with relation to a lstationarycutting-bed, said movement be- ;ing known as a draw cut.' lThe machine fshown, moreover, belongs to that type ofreciprocating paper-cutters inwhich the paperclamp is power-operated and forms a part of the mechanismfor producing the desired movements of the cutter-bar. It is to beunderstood, however, that although certainimthe clamping mechanism theinvention as to certain other features is not limited to a machine inwhich the type of clamping mechan-` ism referred to is employed.

Referring now to the drawings in detail, and more particularly at 4lirstto the4 general views shown in Figs. 1', 2, 3, and 4, the frame members1 and 2, the lower parts of which are iirmly secured-together by thetransverse girders 3, 4, and 5 and by the cutting-tables nand 7 and theupper ends or standards 8 and 9' of which are lirmly secured together bythe top girder. 10. The standards 8 and 9 are provided with verticalslots in which the cutter-bar 11 is'accurately guided to move in twoVdirections-to wit, upwardly and downwardly :to and -fromthecutting-table and lhorizontally or in the direction of' its length.

As far as some of the-features of my invention areconcerned, anysuitable means may be provided forgiving the cutter-bar its verticalreciprocating or cutting movement. In accordance with thebest embodimentof the invention, however, the means shown for reciprocating the knifeare used, and these means constitute one of the principal features of mypresent invention. In accordance with the embodiment of this feature ofAsuitable guides on the outer sides of the standards 8 and 9, said barsbeing provided with vertical slots that embrace the cutterbar, asclearly shown in Fig. 2. In accord*- ance with the best constructioneach of these bars has a double-bearingconnection withthe cutter-bar 11,one of said bearings consisting of therollers 14 and 15, pivot'ed ontransverse studs connecting the opposite my invention vshown a pair ofslide-bars 12 and 13 are mounted to slidevertically in ings as embodyingthe various features of my V invention is of that type ofreciprocating'paportant features of the invention relate tor ofthemachine consists of two vertical side Y IOS sides of the said barsand adapted to engage with the upper and lower surfaces of theI slots 16and 17 of the cutter-bar, and the other of said bearings consisting ofthe plates 18 and 19, located at the tops of the slots in the slide-bars12 and 13 and adapted to slide on the upper surface of the cutter-bar11.

In order that the bearings 14, 15, 18, and 19 may be accurately adjustedwith relation to each other to evenly distribute the pressure, means'areprovided for adjusting the plates with relation to the slide-bars, theadjusting means shown consisting of set -screws 2O and 21.

Any suitable means may be employed for reciprocating the slide-bars 12and 13. accordance with the best construction, however, the means shownare used, said means constituting one feature of the present invention.As shown,vthe slide-bars 12 and 13 are connected by means of links 22and 23 with the short arms 24 and 25 of a pair of levers, which, asshown, are pivoted at the opposite ends of the transverse shaft 26,journaled at a suitable point in the said frames 1 and 2 below andpreferably somewhat to one side of the vertical plane of the slide-bars12 and 13. Any suitable means may be provided for operating said levers.Preferably, however, they are operated by means adapted to give them aslow powerful movement in one direction and a quick return. As shown,said levers are provided with the elongated rearwardly-extending arms 27and 28, which are slotted on their inner surfaces to receive a pair ofcrank-pins carried by large gearwheels 29 and 30,fiXed to the oppositeends of a transverse shaft 31, journaled at a suitable point in theopposite side frames 1 and 2. The gearwheels 29 and 30 are driven in.unison by a pair of pinions, one of which is shown in Fig. 2, saidpinions being affixed to the opposite ends of the shaft 33, suitablyjournaled in the side frames 1 and 2. The shaft 33, in accordance withthe construction shown, is provided at an intermediate point` with agear 34, which is driven by a pinion4 35, fiXed to the power-shaft 36,said power? erating-levers are so arranged with relation to the arms 272 8 of said levers and to the links 22 and 23 that the arms 24 and 25and the links 22 and 23 approach the position of alinement with eachother as the bars 12 and 13 near the limit of their upper stroke. Byreason of this construction the said arms 24 and i25 and links 22 and 23act somewhat like toggle-joints to reduce the motion of the slide-bars12 and 13 with relation to the movement of the power mechanism. Thecutterbar and the parts connected therewith are thus brought to a verygradual rest, and the thumping or jarring that would otherwise result iseffectually prevented.

The cutter-bar 11 is provided in the usual manner with a suitable knife40, and the cutting-table 6 7 is provided with a suitable stationarycutting-bed 41, with which the knife cooperates. For the purpose ofvfirmly supporting the cutting-bed 41 throughout its entire length toprevent the same from yielding under the action of the knife the top ofthe girder 5 is accurately fitted to the under surface of the table 7directly beneath the cutting-bed 41, and said girder is provided with avertical web which is arranged in the cutting-plane and extends as faras pos* sible toward the base of the machine.

The clamping mechanism and the connections thereof with the cuttingmechanism will nextbe described. As shown. the paperclamp consists of anupper power-section 45 and a lower clamp-section 46, both said clampsections being ilitted to slide verlically in suitable grooves in thestandards 8 and 9 directly to the rear of the cutter-bar l l For movingthe clamp downward into an even-pressure contact with the pile of paperduring the cutting operation and at the same time to give the cutter-bara movement in the direction of its length during the cutting operation adiagonal slot-and-pin connection is provided between the clanp and thecutter-bar. As shown, the cutter-bar is provided on its rear face withdiagonal grooves 47 and 48, (see Fig. 5,) and the upper section 45 ofthe clamp is provided near its lower edge with stud-rollers 49 and 50 inposition to engage the lower ends of said grooves when both thecutter-bar and the clamp are at the limit of their upper strokes. Thegrooves 47 and 48 may, as far as some of the features of my inventionare concerned, be extended clear through the cutter-bar, so as to formopen slots therein, as is the, usual construction in this type ofcutter. In accordance with my invention, however, these slots areclosed, the maximum strength and sti'ness of the cutter-har beingsecured by the lconstruction shown.

By reason of the fact that when the machine is in operation the clampreaches the limit of its upper stroke in advance of the cutter-bar 11the clamp is not cushioned by the toggle-like action of the links 22 and23 and arms 24 and 25. ln accordance with my invention, therefore,special means are pro vided for gradually alsorbing the momentum of theclamp. Any suitable device may he employed for this purpose. ln themachine. shown two forms of cushioning devices are IOO TIO

us'ed. One ofv these devices consists of a pai-r ofyspring-pressed.lplungers arranged at the opposite ends of theclamp-section 45. One of said spring devices isshown in detail in Fig.7, the'same-consi'sting of a plunger, fitted in a suitable socket 54 inthe clampsection andpressed upwardly by a helical spring 55 which islconfined between a shoulder' onthe-'plunger and the 'bottom of. thesocket 54. The upward motion of the plunger isad'justably fiXed by thenut 56, which is threaded on they lower end of the plunger and. in.position to engage the under side of the socket.. Suitable brackets 57and 58 are. secu-redl to the inner sides of the standards 8 and 9 inposition to engage the plungers 52 and 53.

Inaccordance with. the preferred construction additional cushioningdevices in the form of friction-brakes are provided. As

show-n, these friction ldevices consist of a pair of verticalfriction-blocks 59 and 60, aflixed to the rear surface of theclamp-section 45, near the opposite ends thereof, in position to enter acorrespondingpair of friction-sockets 61 and 62 as the clamp approachesthe limit of its upper stroke, said blocks being suitably secured, asvby means of the brackets 63 and 64, to the standards 8 and 9. Thefriction-blocks 59 and 60 are preferablyslightly tapered in thedirection of their vertical movement, and the sockets 61 and 62 arecorrespondingly tapered, so that the pressureon the-friction-blocks 1sincreased as the clamp nears the limit of its movement in the upperdirection; The inner surfaces ofthe friction-sockets may be providedwith a liningv 65 of a suitable friction materiali" Preferably, also,means' are provided for adjusting the width of the friction-sockets.

. As shown, one side of the socket is provided with. aremovable part 66,which is held in position by bolts 67 in such a manner thatpackingmaterial may be inserted" between the part 66 and the side of thesocket. vVlith the object in view of readily releasing the clamp fromthe friction devices at the begin-ning of its downward movement thefriction-sockets 62 and-63 are, in accord-'1 ance with theconstructionshown, provided with wedge members 68, which. are held against upwardmovement, but are free to move downwardly with the friction-blocks 59and 60, and thus relieve the pressure thereon, suitable springs69vloeing provided.

to return the wedges 68 in position to grip the'friction-blocks 59 and60 on their return movement. Any yother suitable means for releasing;the'- friction-blocks 59 and 60 may of course be provided. As thecushioningsprings 55 are .under compression while. the clamp is at' thelimit of its upwardv stroke,.said springs will act to assist thecutter-bar in releasing the clamp from the 4friction devices, and thusmake certain that the clamp-Willstart' downwardly withthe cutter- Imovement is largelyk dependent uponv the l sharpness of. thesknife, itis desirable in order v to control the pressure of the clamp on thepaper' to provide some means for varying. at willL the resistance of.the` cutter-bar to a movement in the direction of its length. Anysuitable means` may be provided for this purpose.I In accordance withthe embodiment of the machine illustrated a friction bar or rod. 70 isarranged above andlparallel tothe cutter-bar 11, said friction-bar 7 0lbeing., secured at its opposite ends to the upper ends of the slide-barsl2 and 13. -Mounted onthe upperA part of the'l cutter-bar 11 linposition to engagev the friction-bar 70 is an adjustable friction clamp71;. As shown, this clamp consists of a pair of oppositely-arranged jaws72 and 73, which are freely pivoted at one end on the bar l1 and areformed? at their opposite ends toy embrace the friction-bar' 70,suitable clamp-screws 74 and 75 being provided to vary the pressure ofthe jaws. 'sure ofthe clamp on the paper i'sinsufiicient, it may beincreased by increasing the-friction on the bar 70; On the other hand,as the knife becomes dull the resulting increased pressure may beVrelieved 'by loosening the friction on the bar 70.

With the object inview of bringing the clamp down on the pile of paperwithout operating the cutter, asisrequired4 to. accurately set the pileIof paper in the machine and to cut certain kinds of stock with.accuracy, the lower orl clamp section 46 ofthe clamp is made movableyindependently of the power-section 45, and means are provided wherebythe clamp-section 46` may bemoved into and out of contact with the papermanually and without starting the cutting mechanism. In accordancewiththeconstruction shown they section 46 is secured to the upper end ofa air of'vertically-movable slide-bars 75, which are located insuitablel grooves in the standards 8 and 9 andare extended downwardly toa suitable point below the table 6. The bars 76 are connected at theirlower ends to the opposite ends of a vertically-movable transverse frame77, which is A connectedkat points near its opposite ends to a suitabletreadle 78 by means oflinks 79. The treadle 7 8 is preferably madenearly as wide as the machine and is pivotally connected atthe op ositesides of its rearr end to the lower part o the back girder 3. By reasonof this construction it will be seen that pressure applied at any pointalong thel front vof the treadle -will move the clamp-section 45 yof theclamp downwardly at bot sides with If it is found that the presl ISOequal force. For the purpose of counterbalancing the clam the lower endsof the vbars 76 are connecte by means of links 80, with one end of thelevers 8l, which levers are fulcrumed at an intermediate point on thetransverse shaft 82 and are provided at their opposite ends withcounterbalance-weights 83. Means are preferably provided also forproducing a counterbalancing force which increasesk as the clampapproaches the limit of its upper stroke, so as to assist in a measurethe devices hereinbefore described for overcoming the momentum of theclamp. As shown, this means consists of a tensionspring 84, which isfixed at one end to the girder 3 and at the opposite end to an arm 85,carried by the rock-shaft 82 and so arranged that the tension of thespring increases as `the clamp nears the limit of its upper stroke. Forthe purpose of bringing the clamp-section 46 into contact with the paperby hand with the force required to hold the same during the cuttingoperation a pair of vertically-moving plungers 86 and 87 vare mounted inthe top girder 10, the same extending downward through suitable open*ings in the upper clamp-section 45. The plungers 87 are provided attheir upper ends vwith suitable racks which are engaged by suitablepinions 88 and 89, mounted on a transverse shaft 90, which is suitablyjournaled in boxes carried by the girder 10 adj acent to the plungers.The shaft 90 may be operated by any suitable means. As shown, it isprovided at one end with a worm-wheel 91, which engages a worm 92,carried by the vertical shaft 93, journaled in suitable brackets carriedby the standard 9. At its lower end the shaft 93 is geared to a shorthorizontal shaft journaled in a bracket 94 and provided at its outer endwith a hand-wheel 95. Both the foot and hand operating means for theclamp are usually used in conjunction with the power-clamp, either toaid in setting the stock in the machine or to increase the clampingpower or for both purposes. When, however, small cuts are being made orfor other reasons extremely light clamping is desired, the foot-clampmay be used alone or it may be supplemented by the handclamp, theower-section 45 being locked at 'the upper imit of its stroke bysuitable means, as the pins 69a, removably itted in suitable openings inthe frictionfsockets 61 and 62 below the blocks 59 and 60.

The operation of the various parts of the machine having been fullydescribed in connection with the construction thereof, furtherdescription of the operation will be unnecessary.

My invention in its broader aspects is not limited to the particularconstruction shown norto the particular construction by which it can becarried into effect, as many changes may be made in the constructionWithout departing from the main principles of the invention and withoutsacrificing its chief advantages.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is-

1. In a paper-cutting machine, the combination of a cutter-bar andmechanism for reciprocating the same, said mechanism consisting of alever pivoted in operative relation with each end of the said bar,connections be tween one arm of each lever and the corresponding end ofthe bar, and power devices for operating said levers, each of saidconnections including a link pivoted to the corresponding lever-ar1n andarranged to approach close alinement therewith as the bar nears thelimit of its return stroke, whereby the cutter-bar is gradually broughtto rest on its return stroke, substantially as described.

2. ln a paper-cutting machine, the combination of a cutterebar andmechanism for reciprocating the same, said mechanism consisting of alever pivoted in operative relation with each end of said bar,connections between one arm of each lever and the corresponding end ofthe bar, and power devices for operating said levers to reciprocate saidcutter-bar with a quick return stroke, each of said connectionsincluding a link pivoted to the corresponding lever-arm and arranged toapproach close alinement therewith as the bar nears the limit of itsreturn stroke, wherebythe cutter-bar is gradually brought to rest on itsreturn stroke, substantially as described.

3. In a paper-cutting machine, the combination of a cutter-bar andmechanism for rcciprocating the same, said mechanism consisting of alever pivoted in operative relation with each end of said bar,connections between one arm of each lever and the corre* sponding end ofthe bar and power devices for operating said levers, each of saidconnections including a slide adapted to engage the bar and a link)ivoted to the slide and to the corresponding lever-arm and arranged toapproach close alinement with the lever-arm as the bar nears the limitof its return stroke, whereby the cutter-bar is gradually brought torest on its return stroke, substantially as described.

4. In a paper-cutting machine, the combination of a cutter-bar and meansfor reciprocating the same, said mechanism consisting of a lever pivotedin operative relation with each end of said bar, connections between onearm of each lever and the corresponding end of the bar and power devicesconslsting of a crank engaging a groove in the other arm of each leverso as to reciprocate said cutter-bar with a quick return stroke, each ofsaid connections including a slide adapted to engage the bar and a linkpivoted to the slide and. to the corresponding lever-arm and arranged toIOO approach close alinementwith the lever-arm asl the'barnears thelimit of its return stroke,

whereby thel cutter-bar is gradually brought tofr'es't on itsfreturnstroke, lsubstantially as described.`

Inapaper-cut'ting machine, the combination of'a cutter-bar, mechanismfor reciprocating. said bar transversely tothe direc'- tion of itslength to cut the paper, said mechanism includinga- -slide arranged-ateach end ofthe bar', each-slide having a` plurality of ,bearingson'said'bar in the direction of its cutting movement, means vforadjusting one of said bearings with relation toy the other, and meansforrnoving the cutter-bar the direction of its length during the cuttingopera-n ,bearing on said bar' one arranged beyond the other inthedirection of the cutting movement, meansfor' adjusting the slide-bearingwith relation-to the other, and means for movingthe cutter-bar in thedirection of its length 'during the cuttingoperation, substantially asdescribed. y

7 .4 Ina paper-cutting machine,fthe combination'of acutter-bar,mechanism `for reciprocating said bar, a paper-clamp, connectionsbetween the cutter-bar and the clamp where- `by the latter' is operatedby and with the cutter-bar, and' means independent of the mechanism forreciprocating the cutter-barfor effectively resistingth'e motion of theclamp as it approaches the limit of. its return move-- ment,substantially as described.

8. In a paper-cutting machine, the combination of 'a cutter-bar,mechanism for reciprocating'said bar, a' paper-clamp, connectionsbetweenythecutter-bar and the clampl wherev by the clanip is operated byand with thecutter-bar, and means consisting of a frictionbrakeA one'membery of which is carried by the fram-er and the other by theA clamp`forretardingutyhe motion' of the clamp as itapproaches the" limit of4its return movement, substantially as described.

9i Ina paper'- cutting machine, the combination of a vcutter-bar,mechanism for reciprocating-sai'd bar, a paper-clamp, connectionsbetweenvthe cutter-bar and the clamp wherebythe clfamp-isoperated by andwith the cutter-bar, and means consisting of africtionbrake'forretarding the motion of the clamp as'it nears the limitof its return motion, and means for releasing thek brake as they clampbegins its forward stroke, substantially as described. l

10; In ajpaper-cutting machine, the com.- bination of a' cutter-bar,mechanism for recip- Ebetween the cutter-bar and the clamp whereby theclamp is operated by and with the cutter-bar and a friction-brake'- forretarding the motion of the clan-1p as it nears the limit of its returnmotion, said brake having a springcontrolled sliding bar` to release theclamp-at the beginning of itsforward stroke, substantially as described.

11; In a paper-cutting machine, the combination-of a cutter-bar,mechanismfor reciprocating said bar, av paper-clamp, connections betweenthe cutter-bar and the4 clam-p whereby the clamp is operated by and withthey cutter-bar, and means consisting of afriction-brake and a spring'cushioning device for retarding the motionf'of -theV` clamp as itapproaches the limit` of its return'moveme'nt, substantially asdescribed.

A12. In a paper-cutting machine, the combination of a cutter-bar,mechanism for 'reciprocating said bar', a paper-clamp, connectionsbetween the cutter-bar and the clamp whereby the clamp is operated byand with the cutter-bar, and means consistingof a friction-brake and aspring cushioning device for' retarding the motion ofthe clamp asv itappr'oaches' the` limit of its return movement, said brake having meansfor releasing the clamp at'the beginning of its forward vstroke and saidcushioning device bei-ng constructed to; assist in starting the clamp onits forward stroke, substantially asdescribed.

131. In a paper-cutting machine, the com"- pbination of a cutter-bar,mechanism forreciprocatmg saldibar, a paper-clamp, connections betweenthe cutter-bar and the clamp whereby the clamp is 4operated by and withthe cutter-bar, and means consisting ofa friction-brake for retardingthe motion of the clamp nearthe limit of its return motion, isaid brakeconsisting o f a wedge member afr fixed neareachend of the clamp andfrictionsockets aflixed to the frame in position to receive the wedgemembers as the clamp approaches the limit of its return motion,substantially as described.

14.- In a paper-cutting machine, theA combinationy of a cutter-bar,mechanism for reciprocating' said bar, a paper-clamp, connectionsbetween the cutter-bar and the clamp whereby' the clamp is,l operated byand with the cutter-bar, and means consisting of a friction-brake forretarding the motion of the clamp near the limit of its return motion,saidbrake consisting of a wedge member'affixed near each end of theclamp and frictionsockets aflixed to the frame in position to receivethe wedge members asl the clamp approachesthe limit of its returnmotion, each socket having a yielding membery torelease the wedge at thebeginning of thev forward motion of the clamp, substantially asdescribed.

15. In va paper-cutting machine, the com-l rocating said bar,apaper-clamp, connections l bination of a cutter-bar, mechanism for re-IOO IOS

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ciprocating said b ar, a paper-clamp, connections between the cutter-barand the clamp whereby the clamp is operated by and with the cutter-bar,said connections being such that the cutter-bar is caused to move in thedirection of itsv length during the operation ot cutting and that theclamping pressure is dependent uponr the resistance of the cutter-bar tomovement4 in the direction of'its length, and means Jier varying saiiresistance, .substantially as described. v

16. In a paper-cutting machine, the combination of a cutter-bar,mechanism'for reciprocating said bar, a paper-clamp, connections betweenthe cutter-bar and the clamp whereby the clamp is operated by and witfiy the cutter-bar, said connections being such that the cutter-bar iscaused to move in the direction of its length duringthe operation ofcutting and that the clamping pressure is dependent upon the resistanceof the cutter-bar to movement in the direction of its length, `and'meansconsisting of an adjustable triction d evice for varying saidresistance, substantially as described.

.17. In a paper-cutting machine, the combination of a cutter-bar,mechanism for reciprocating said bar, a paper-clamp, connections betweenthe cutter-bar and the clamp whereby the clamp is operated by and withthe cutter-bar, said. connections being such that the cutter-bar iscaused to move in the direction of its length during the operation ofcutting and that the clamping pressure is dependent upon the resistanceof the cutter-bar to movement in the direction of its length, and meansfor varying said resistance, said means consisting of alongitudinalfriction member carried with the cutter-bar in the direction of thecutting movement but heldagainst movement in the direction of its lengthand an adjustable clamp axed to the cutter-bar and adapted to engagesaid longitudinal member, substantinally as described.

18. A paper-cutting machine including in combination ja pair of sideframes, a cuttergbar having diagonal grooves extending only part waythrough said bar, mechanism carried by said side frames forreciprocating said cutter-bar, a cross-girder connecting said sideframes, said girder having a web of great width located in the plane ofmovement of the cutter-bar, and av cutting-bed supported throughout itsentire length in the plane of said web substantially as described.

19.A In a paper-cutting machine, the combination with a cutter-bar andmeans for reciprocating the same, of a paper-clamp having a power memberconnected to the cutterbar and operated thereby, a clamp member movableindependently of the power member, and means for operating the clampmember independently of the power member, and means for locking saidpower member against scribed.

20. In a paper-cutting machine, the combination with a cutter-bar andmeans for reciprocating the same, of a paper-clamp having a power memberconnected to the cutterbar and operated thereby and a clamp inembermovable independently of the power member, arock-shai't journaledparallel with said clamping member, an arm affixed near each end of saidrock-shaft, connections between said arms and the ends of said clampmember, and means for operating said clam p member independently of thepower member, substantially as described.

21. In a paper-cutting machine, the conibination with a cutter-bar andmeans for reciprocating the same, of a paper-clamp having a power memberconnected to the cutterbar and operated thereby and a clamp membermovable independently of the ower member, a rock-shaft journaled parallewith said clamping member, an arm ailixed near each end'oi' saidrock-shaft, connections between said arms and the ends of said clampmember, a foot-lever, and connections between said foot-lever and clampmember for operating said clamp member inde )end ently of the powermember, substantially as described.

22. In a paper-cutting machine, the combination with a cutter-bar andmeans for reciprocating the same, of a paper-clamp having a power memberconnected to the cutterbar and operated thereby and a clamp membermovable independently of the )ower member, a rock-shaft journaledparalle with said clamping member, an arm affixed near each end of saidrock-shaft, connections between said arms and the ends of said clampmember, means for operating said clamp member independently of the powermember, and means for counterbalancing the weight of said clamp memberconsisting of balance-weights and a spring so connected to said shaft asto oppose the weight of said clamp with an increasing force as the clamprises, substantially as described.

23. In a paper-cutting machine, the combination with a cutter-bar andmeans for 'reciprocating the same, of a paper-clamp havi clampingmovement, vsubstantially as de- 6 5 IOO IIO

spring so connected to said shaft as to' oppose I t -bar by meansadapted to give the cutter-bar a longitudinal movement during thecutting operation, and a clamp member movable independently of the powermember, a plurality of plungers for operating the clamp member, saidplungers being provided With rackteeth, a shaft having pinions foroperating said plungers and hand-operating means for y operating saidshaft, substantially as described.

. 25. In a-paper-cutting machine, the combination of a `cutter-barhaving diagonal grooves, studs engaging said grooves, and means forreciprocating said bar, said grooves extending only part Way throughsaid bar., substantially as described.

26. In a paper-cutting machine, the combination of a cutter-bar havingdiagonal grooves,a paper-clamp'having studs engaging said grooves, andmeans for reciprocating said bar, said grooves, except for openingsadapted to aline with said studs at one part of the stroke of the bar,extending only lpart Way through said bar, substantially as described.

In testimony.vvhereoi` I have `signed my name to this specification inthe presence of 3 5 tWo subscribing Witnesses,

. i SAMUEL K. WHITE. Witnesses: K 4

E. S. SMITH, E. SMITH.

